# Posts by joe

Total # Posts: 2,692

**math**

The weights of ice cream cartons produced by a manufacturer are normally distributed with a mean weight of 10 ounces and a standard deviation of 0.5 ounce.(a) What is the probability that a randomly selected carton has a weight greater than 10.21 ounces?(b) You randomly ...

**French**

Is “bonjour mon baguettes” culturally insensitive

**Chemistry**

The heat evolved in the reaction of hydrobromic acid with potassium hydroxide was determined using a coffee coup calorimeter. The equation for the reaction is: HBr(aq) + KOH(aq) -------------> KBr(aq) + H2O(l) When 25.0 mL of 1.00 M HBr at a temperature of 24.5oC was ...

**Chemistry**

This is Joe again the answer should be -13.8kcal/mol but i don't know how to this get this answer.

**Chemistry**

The heat evolved in the reaction of hydrobromic acid with potassium hydroxide was determined using a coffee coup calorimeter. The equation for the reaction is: HBr(aq) + KOH(aq) -------------> KBr(aq) + H2O(l) When 25.0 mL of 1.00 M HBr at a temperature of 24.5oC was ...

**Pre algebra**

Expression in simplest form that represents the perimeter of a polygon that is 8cm 9x 8cm 9x

**Social studies **

What are major differences between ancient Aksum and modern day Ethiopia???? Need help fast!!!!!!

**Precalc**

Find a possible formula for the trigonometric function whose values are in the following table (note the values in the table may be slightly rounded): x 0.00 0.17 0.33 0.50 0.67 0.83 1.00 1.17 1.33 1.50 1.67 1.83 2.00 g(x) 4.00 5.50 6.60 7.00 6.60 5.50 4.00 2.50 1.40 1.00 1....

**Precalc**

point) The pressure P (in pounds per square foot), in a pipe varies over time. Four times an hour, the pressure oscillates from a low of 40 to a high of 300 and then back to a low of 40. The pressure at time t = 0 is 40. Let the function P = f(t) denote the pressure in pipe at...

**Science, Please help, due very soon!!!**

Describe how you would prepare the following two solutions. Be sure to include the type of glassware which you would use and as much detail as necessary for someone to actually prepare the solution using good laboratory technique. • 250 mLs of a 5% NaCl (w/v) from solid ...

**Chemistry**

This is due very soon, please help!!! Describe how you would prepare the following two solutions. Be sure to include the type of glassware which you would use and as much detail as necessary for someone to actually prepare the solution using good laboratory technique. • ...

**Chemistry**

Describe how you would prepare the following two solutions. Be sure to include the type of glassware which you would use and as much detail as necessary for someone to actually prepare the solution using good laboratory technique. • 250 mLs of a 5% NaCl (w/v) from solid ...

**Math**

THX

**Math**

A sales representative for Data Electronics earns a salary of 1314 dollars per month plus a commission based on the total value of her sales. If she earned 1484.40 dollars for the month and her sales totaled 5680 dollars, what is her rate of commission?

**Chemistry**

I dont understand this. please explain the relationship between wavelength, frequency and energy of light waves and the difference between the types of electromagnetic radiation.

**Chemistry**

An electron in a hydrogen atom absorbs 15.5 x 10-20 J of energy. If the electron originated at energy level 3, to what level was it excited?

**science**

What is the energy of light (in J) emitted by a hydrogen atom when an electron relaxes from the 7 energy level to the 5 energy level?

**Chemistry**

What is the energy of light (in J) emitted by a hydrogen atom when an electron relaxes from the 7 energy level to the 5 energy level?

**Chemistry**

According to the idea of wave particle duality, which of the following items has a wavelength? Choose all that apply. An electron moving at 2.80 m/s. A planet moving at 180,000 km/hr. A gas molecule moving at 515 m/s A person running at 10 mi/hr. i think its A and D is it ...

**Chemistry**

Why wasn't information about the mass of isotopes sufficient for identifying the isotopes? Provide an example to explain the answer. Figure 2 shows 2.5 min averaged spectra of ambient aerosol at nominal m/z 208 obtained with the HR-AMS located at T0. Panel A compares V- ...

**Business**

What type of business can be designated as profit or non-profit? a)Corporation b)Company c)Sole proprietorship d)LLC

**Algebra**

This is a two part question, make sure you answer both parts: In the following subtraction problem the letters A, B and C stand for three different digits ( There are not any other operations involved in this problem). What digits should replace each letter? ABA - CA = AB What...

**Pre Calc**

1)A particular pain relieving medicine has a decay rate of 10 % per hour. A patient was given a dose of the medicine 7 hours ago and there is currently 68 milligrams of the medicine in the patients bloodstream. 2)How long will the patient need to wait for there to be less than...

**Social studies**

This is ur site Ms. Sue?

**math**

I also got 125,000

**Maths**

Thx

**Maths**

The heights of four of the starting players on the basketball team are 183 cm, 178 cm, 174 cm, and 185 cm. If the mean height of all five starting player is 182 cm, what is the height of the fifth starting player? Plz explain

**Math**

Thank You Scott

**Math**

You have five identical pieces of equipment. There is a 1 in 10 chance that each piece will fail in a year. What is the likelihood that ALL pieces fail in the same year?

**Algebra**

Trina has 36 marbles in three different colors. There are twice as many red ones as blue ones. There is one more green marble than there are red marbles. How many red marbles are there? How many green marbles are there?

**Math**

1) The numbers 2 and 3 are prime numbers. They are also consecutive numbers. Are there other pairs of primes that are consecutive numbers? Why or why not? 2) which group of numbers, evens or odds, includes more prime numbers? Why?

**Math**

a) Find all of the numbers between 1 and 1,000 that have 2 as their only prime factor. b) What is the next number after 1,000 that had 2 as its only prime fractor?

**phisical science **

On a winter day the temperature drops from –15°C to –25°C overnight. If a pan sitting outside contains 0.20 kg of ice, how much heat is removed from the ice for this temperature change?

**anthropology**

I'm glad my question helped you to find answers too Karen! Thanks bobpursley!

**anthropology**

I have to write a paper about the role anthropologists play in migration with 3 examples. They just study migration, right? so would I just pick 3 examples of different people that have migrated?

**Algerbra**

Six friends split the cost of a party. each person also spends $65 for a hotel room. each person $160 on the party and a room. What is the cost of the phone?

**Precalculus**

What is the radian measure of arctan 1/2 + arctan 1/3?

**Physics**

Matt is attempting to sail a sailboat northeast across the river with a velocity of 13 m/s relative to the current of water. The water current is flowing from south to north at a velocity of 6 m/s. If the angle between the velocity of the sailboat and the water current is 40 ...

**PAP ALG**

333197

**Ed Tech plz helppppp**

1.A 2.B 3. D 100%

**Ed Tech plz helppppp**

kelly is right

**Math**

its D C C A

**Algebra**

y varies jointly as X and Z. y=64 when x=4 and z=8. Find y when x=8 and z=6

**Math**

9a to the 4th power squared

**Help me again in stats**

Find the corresponding z-score to the given value and determine whether the value is unusual. A weight of 225 pounds among a population having a mean weight of 161 pounds and a standard deviation of 23.0 pounds.

**Stats in need of help**

Assume that you entered a drawing to win one of 35 movie tickets. If only 650 people enter the drawing, determine the probability of winning (round your answer to three decimal places)

**English**

My mother feels (bad, badly) about what happened. I think that it is bad.

**math **

Macy's Department Stores markup men's cologne 63% on cost for an 8-ounce bottle. A bottle of cologne costs Macy's $23.00. What is the selling price for the 8-ounce bottle? $31.51

**Data**

Of 20 people invited to a pool party, 4 prefer vanilla ice cream, 7 prefer chocolate, and 3 prefer strawberry. The host surveys six of these people at random to determine how much ice cream to buy. a) What is the probability that at least 3 of the people surveyed prefer ...

**Math**

Suppose that the weather forecast calls for a 30% chance of rain on each of the three days of a long weekend. What are the odds in favour of no rain throughout the entire long weekend? Claudia and Ally are the two favourites to win an upcoming golf tournament. If Claudia is ...

**Math**

Calculate the probability that 200 rolls of two dice rolls will include a) more than 30 sums of 5 b) between 30 and 40, inclusive, sums of 5

**Math**

A designer enlarged both the length and the width of a rectangular carpet by 50 percent. The new carpet was too large so the designer was asked to reduce its length and its width by 20 percent. By what percent was the area of the final carpet design greater than the area of ...

**Math**

The list below gives the number of patrons per day over a 30-day period during July at a theatre. 127 126 125 132 128 122 156 172 183 171 160 140 154 160 122 187 185 158 112 145 168 187 117 120 171 171 156 163 168 162 a) Find the mean and standard deviation of these data. b) ...

**Math**

How do I convert improper fractions into decimals?

**Maths **

Given that the line y=mx+c is a tangent to the circle (x-a)^2+(y-b)^2 = r^2 show that: (1-m^2)r^2=(c-b+ma)^2

**Maths**

show that the circles x^2 + y^2 - 10x - 8y + 18 = 0 and x^2 + y^2 - 8y - 4y + 14x = 0 do not intersect

**math 107**

idk

**Spanish 1 b**

please check my answers 2. How do you say one must in Spanish A. Hay que * B. A menudo C. Que más D. Es necesario 5. A person of mixed European and indigenous heritage is commonly to as a____ A. Mixtec B. Mestizo* C. Maya D. Nahuatl 6. Which is not a place in the ...

**math**

a bus driver filled up 7/8 of her fuel tank for a trip. she used 6/7 of the fuel by the end of the trip. the capacity of her tank is 70 gallons. how much fuel did she sue for the trip. express answer a decimal

**Maths**

Please help Trigonometric identities proof (cot^2(x)(sec(x)-1))/1+sin(x)=(sec^2(1-sin(x))/1+sec(x) Many Thanks

**Maths**

Please solve this trigonometric identity proof problem. I have completed 20; this is the hardest one. Many thanks (sin^3(x)-cos^3(x))/sin(x)-cos(x)=1+sin(x)cos(x)

**georgraphy**

Dis dos yo mamas anus

**math**

what is 8,903.045 in 100s place

**Maths**

A monument is to be constructed in the form of a pyramid with base ABC in which AB = AC = 15M and BC = 20m. The vertex,v is 12m vertically above A Calculate the area of triangle VAB Calculate the area of triangle VBC Special bricks for the outer faces are required and 14 ...

**Maths**

An item of jewellery consists of two identical pyramids, PABCD and QABCD, joined at their common rectangular base. AB = 8mm, BC = 12mm and PQ = 30mm. The line pq passes through the centre of the rectangle ABCD. Calculate the area of triangle ABP Calculate the area of triangle ...

**math**

solve for x 4x+5=8+x

**chemistry**

3.05 g hydrated copper sulfate produces 1.94 g of anhydrous salt.Assuming complete removal of all water of crystallisation,determine tha formula of hydrated copper sulfate.

**Statistics**

Im not sure

**Physics**

I have this very confusing two part question that i am having trouble understanding. For the first question i first created a free body diagram to show the forces acting on both the boxes. However i am unsure of what to do after this since i don't understand how to use ...

**Math**

8 bags

**Math**

A restaurant uses 80 pounds of potatoes per week. The restaurant owner buys the potatoes in 10-pound bags from a local farmer. How many bags will the owner need to buy this week?

**math**

Hi can someone help me i am takeing a test i am in connexus adamaey i need help on my test

**enviromental chemistry**

If 10 ppm of nitrogen dioxide is present 1000 L of air at a pressure of 1 atm and temperature of 27 °C, what is the amount of ammonia necessary to react?

**Math**

Martin has 12 times as many baseball cards as Josie. Josie has 29 more cards than Kal. How many baseball cards does Martin have?

**Physics**

Im doing an egg car crash project, is there any tips and tricks to protect your egg in a made car?

**Physics**

Two movers are attempting to push a 300kg piece of furniture across the floor. One man pulls horizontally with a force of 45N while the other pulls with 80N at a 25 degree angle. If the crate slides with an acceleration of 9.15m/s^2, what is the frictional force between the ...

**Math**

A shipping box shaped like a rectangular prism has a height of 6ft and a volume of 96ft3, what is the length and width of the base for the box? Show the description whit a grid.

**Math**

if tina deposits $500 into a bank account that earns 4.5% interest compounded continuously, how long will it take for her account to have $2500 in it

**Physics**

A bullet of mass m travelling at speed vo in the direction shohwn above strikes a block of mass M and embeds itself in it. The block is sitting on the edge of a frictionless table of height H and is knocked off of the table by the collision. a) What is the speed vb of the ...

**math**

If i buy an annual coupon bond with a coupon rate of 7% for $875.00. the bond will mature in 10 years to maturity. What rate of return do you expect to earn ?

**math**

The measurements in the list below have a characteristic in common. 6x5 2 miles 6x5 72,000 inches 6x5 3,000 feet Which statement describes the common characteristic? A Each measurement is greater than 4,000 yards. B Each measurement is equivalent 1,760 yards. C Each ...

**Mathmatics**

Prove algebraically that the difference between the square of any two consecutive integers is equal to the sum of these two integers. First number = n Second number = n+1 Square the second number: (?????)^2 Difference between the squares: ????? Sum of the consecutive integers...

**Mathmatics**

Show that the equation 3x^2 - x^3 + 3 = 0 can be rearranged to give: x = 3 + 3 ---- x^2 x^3 = Divide by ? = x = 3 + 3 ---- x^2 Using Xn+1 = 3 + 3 with x0 = 3.2 ---- x^2n find the values of x1 x2 and x3? What to the values of x1 x2 and x3 represent? The represent estimates of a...

**Algebra**

If I were to make an equation so that the left side were reciprocal function and the right side were an absolute value function then the equation would be guaranteed to have at least one solution. Why?

**Algebra**

Ok thanks

**Algebra**

Create an equation where the left side is a cubic function and the right side is a cube root function. Make it so that the equation has exactly one solution.

**Algebra**

Create an equation where the left side is a linear function and the right side is a square root function. Make it so that the equation has exactly two solutions.

**Algebra**

Two graph never intersect. As such, the equation has no solutions. Create an equation where the left side is a linear function and the right side is a square root function. Make it so that the equation has exactly one solution.

**algebra**

what is the solution of the system? Use substitution. 3x-y=-9 4x -y=-4 my answer is (-5,-6) can you please help

**algebra**

(4t)^-2 t^0/t^6 v^-8 = [(4t)^-2][t^0/t^6][v^-8] = [(1/16)(t^-2)][(v^-8)/t^6] = (1/16)(t^-8)(v^-8) = Since t^0 = 1 AND Assuming that the But...Your notation is unclear. You may also write: (4t)^-2 t^0/t^6 v^-8 = [(4t)^-2](t^0)/(t^6 v^-8) = [(1/16)(t^-2)][(v^+8)/t^6] = (1/16)(t...

**math**

2+3 = 5 5+5 = 10 10+7 = 17 3, 5, 7 are the first three prime numbers after [1 and] 2. Let p1 = 3, p2=5, p3=7, etc. It is logical to assume that the next terms in the sequence are 17+11 = 28 28+13 = 41 etc. so that we have 2+p1 = t1 (first term in sequence) t1+p2 = t2 t2+p3 = ...

**Math**

y = -2x + b, b not equal to 4

**english**

I need a Christmas word with all these letters in it RODDNE

**Math**

x - .33x - .50x =3.21 x = 3.21/1.83 x = pocket money

**Fractions**

(3 1/2 mi)×(3/4 cups)/(1/2 mi) = 7/2 × 3/4 × 2/1 = 21/4 cups

**Calculus Help 3 Questions**

Differentiate the given equation to obtain: 2xdx+cos(xy)(xdy + ydx)+6ydy = 0 2xdx+cos(xy)ydx = -cos(xy)xdy-6ydy dy = (2xdx+cos(xy)ydx)/(-cos(xy)x-6y) At (x,y) = (1,1), and dx =0.01 we find: dy = [2×(0.01)+0.01×cos(1)]/[-cos(1) - 6] cos(1) = 0.54 so that dy = .025/-...

**Calculus Help 3 Questions**

Prob. 5: Let base measure b×b Let height = h Vol = h × b^2 = 245 cm^3 Material = 2×b^2 + 4×bh b = sqrt(245/h) Material = 2×(245/h)+4×sqrt(245h) SOLVE: d(Material)/dh = 0 to find h.

**Calculus Help 3 Questions**

EITHER: s' = ds/dt s' = 8t + 4 = speed in ft/sec At t = 0, speed = 4 ft/sec At time t =10, speed = 84 ft/sec Avg Speed = 0.5(84 + 4) = 44 ft/sec OR: At time t = 0, s = 0 ft At time t = 10, s = 440 ft Avg. Speed = 440 ft/10 sec = 44 ft/sec

**Calculus**

Use the form: f'(x^n) = nx^(n-1)